This guide is designed to aid Illinois RiverWatch Citizen Scientists to identify stream macroinvertebrates.|
Only those stream indicator taxa used in the assessment of stream quality by Illinois RiverWatch are
listed in this guide.
Not all macroinvertebrates collected can be identified with this guide.
The use of these organisms for stream quality assessment is restricted to the state of Illinois.
Size ranges given are for mature individuals.
Photography: C. Nixon, M. Jeffords, P. Nixon, and M. Rosales
Illustrations: C. Nixon and Loren Kirkwood
Designed by Peter Chen for
Illinois RiverWatch Stream Monitoring.